Anmerkungen:
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Beschreibung:
Traceability is a critical element of any rigorous software development process. It is required by numerous software lifecycle activities such as, for example, safety analysis, change impact analysis, coverage analysis, and compliance verification. Safety guidelines such as ISO 61508 and its domain specific derivatives explicitly require the implementation of software traceability. Although the crucial importance of traceability is commonly acknowledged, software development projects rarely follow explicit traceability strategies. Traceability is rarely planned or systematically created but should rather be regarded as a desultory ad-hoc effort. In result, existing traces are potentially of dubious quality but serve as the foundation for high impact development decisions. To ensure that traceability is trustworthy, the fitness for purpose of a project’s traceability implementation must be thoroughly ascertained, especially within the context of safety-critical software. Assessing the fitness for purpose is an intricate problem for several reasons. Depending on the project specific traceability goals, different ways of traceability are applied within multiple projects. The development of safety-critical software is subject to different regulations with diverse provisions that need to be regarded. This thesis will present an approach to systematically assess the fitness for purpose of a project’s traceability implementation, comprising two parts. The first part supports the planning of purposed traceability, which is a prerequisite for the traceability assessment. Based on the planning results, the second part supports the actual assessments. It defines an analytical traceability assessment model. This model provides a comprehensive classification of possible traceability problems and defines assessment criteria to systematically detect these problems. The results of a traceability expert survey suggest that proposed traceability problem classification is complete and defines relevant assessment criteria. The ...